Speaking to reporters on a conference call, she said: "It was amazing and terrifying at the same time. I hadn't been on a stage in three years and I thought I was a little more ready than I was, because I didn't expect the amount of sheer panic that I was going to have when I stepped onto the stage; I did have a bit of a panic attack.

"I was very nervous - you can hear it in my voice when I'm singing - but once it was over it was like, 'OK, I can do this again. I can get back into this game and I can get better'. So it was wonderful and terrifying all at the same time."

"We moved out in a month as soon as we could find a new place that was mould-free and we got rid of all of our stuff just in case, because that's what's recommended if you find mould in your house," she said.

Watch Katrina Parker's audition below:

"It took a few months but within a year after moving my health improved dramatically. It's just been incredible how much better I feel since getting out of that situation."

Parker learned that she had earned the chance to audition for The Voice when Carson Daly surprised her at work.

"It was a complete shock," she recalled. "I was giddy, first of all, because obviously at that point I realized what he was there for, and beyond that I was just in shock. Then when my co-workers came around the corner and everyone was clapping it was just a ridiculous moment.